Remove remote tree host and some related input and metro_driver code

ash/host/ash_remote_window_tree_host_win.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ash/host/ash_remote_window_tree_host_win.h"
-
-#include "ash/host/root_window_transformer.h"
-#include "ash/ime/input_method_event_handler.h"
-#include "ui/events/event_processor.h"
-#include "ui/gfx/geometry/insets.h"
-#include "ui/gfx/transform.h"
-
-namespace ash {
-
-AshRemoteWindowTreeHostWin::AshRemoteWindowTreeHostWin(HWND remote_hwnd)
-    : aura::RemoteWindowTreeHostWin(),
-      transformer_helper_(this) {
-  SetRemoteWindowHandle(remote_hwnd);
-  transformer_helper_.Init();
-}
-
-AshRemoteWindowTreeHostWin::~AshRemoteWindowTreeHostWin() {}
-
-void AshRemoteWindowTreeHostWin::ToggleFullScreen() {}
-
-bool AshRemoteWindowTreeHostWin::ConfineCursorToRootWindow() { return false; }
-
-void AshRemoteWindowTreeHostWin::UnConfineCursor() {}
-
-void AshRemoteWindowTreeHostWin::SetRootWindowTransformer(
-    scoped_ptr<RootWindowTransformer> transformer) {
-  transformer_helper_.SetRootWindowTransformer(transformer.Pass());
-}
-
-gfx::Insets AshRemoteWindowTreeHostWin::GetHostInsets() const {
-  return gfx::Insets();
-}
-
-aura::WindowTreeHost* AshRemoteWindowTreeHostWin::AsWindowTreeHost() {
-  return this;
-}
-
-gfx::Transform AshRemoteWindowTreeHostWin::GetRootTransform() const {
-  return transformer_helper_.GetTransform();
-}
-
-void AshRemoteWindowTreeHostWin::SetRootTransform(
-    const gfx::Transform& transform) {
-  transformer_helper_.SetTransform(transform);
-}
-
-gfx::Transform AshRemoteWindowTreeHostWin::GetInverseRootTransform() const {
-  return transformer_helper_.GetInverseTransform();
-}
-
-void AshRemoteWindowTreeHostWin::UpdateRootWindowSize(
-    const gfx::Size& host_size) {
-  transformer_helper_.UpdateWindowSize(host_size);
-}
-
-ui::EventDispatchDetails AshRemoteWindowTreeHostWin::DispatchKeyEventPostIME(
-    ui::KeyEvent* event) {
-  input_method_handler()->SetPostIME(true);
-  ui::EventDispatchDetails details =
-      event_processor()->OnEventFromSource(event);
-  if (!details.dispatcher_destroyed)
-    input_method_handler()->SetPostIME(false);
-  return details;
-}
-
-}  // namespace ash